Juniata sentinel and Republican. [volume] (Mifflintown, Juniata County, Pa.) 1873-1955, 1887-08-31
SCIENTIFIC.


duction of water-marked papers, a pro-
cess involving the production OF such
water lines after the paper has been
Drinted or calendered- The design or
device to be produced Is drawn on thin
paper and pasted on to cardboard, say
of one inch thickness. The design IS
next cut out and pasted on TO a stout
cardboard and covered with a thin
sheet OF paper, and on the plate or re-
lief thus produced being passed through
a calender, together with the paper 10
be marked, the effect desired Is pro
dCced, and the relief or plate may be
used repeatedly
1 ue,r novelty hunting knife has
made Its appearance, the special feature
OF which is the manner in which the
blade is connected with the handle and
opens. In operating this knife 1t Is
held point downward. then by moving
the latch which holds the blade the
blade drops out TO its full length and IS
then firmly locked. In CLOSING tie
knife the operation Is reyersed-the
point turned up and the latch drawn
back when the blade drops in, and the
latch being released the blaie IS Sc
curely closed, keeping the blade In and
excluding dirt from the knife.
Tie discovery OF 4 new gas IS rare
AMI impO rtant event TO chemists Such
a discovery has been announced In Ger
many by Dr. TheOdOr Curtus, who has
succeeded in preparing the long sought
hydrIde Of nitrogen, amidOgen, diam'de
or hydTaZine, as II is yariOuSly called
This remarkable body, which has hith-
erto baillsd all attempts at isolation, Is
now shown To be a gas, perfectly stable
1t mr. nf a
culiar odor, differing from that OF am
monia, exceedingly soluble in water
and OF basic properties. In composition
Il - nearly Identical with ammonia,
both being compounds OF nitrogen and
hydrogen.
Tie nitrate Of lead is the cheapest
dIsinfectant known that fulflls Its in
tent. It j. made by dissOlving half n
dram Of nitrate OF lead in pint Of
boiling water, then dissolve two drams
Of common salt in eight or ten quarts
of wafer When both are thoroughly
dissolved pour the two mixtures to-
gether, and when the sediment has
settled you have Iail of clear fluid
which IS the saturated solution OF the
chloride of lead. a pound of the nitrate
Will make several barrels of the liquid.
JTc thus describe Theoretically sealed
batteries The cell is made of ebonite,
and Is closed by an ehJnIte lid with
washer of soft iudIa-Tubber. The upper
part of the cell Is split up into several (
divisions, in which are placed the car
bous AMI zines; the lower part contains /
the exciting fluid. The battery is put |
into action 10y reversing It. In the ebO-
mite lii are apertureS closed by thin |
Ii a1
low of the expansion of the gas
produced in the battery, without /
any risk of damage to the ebOnite cell, ]
and without the acid being forced up /
through the vent as is the case in other 1
hermetically sealed batteries.
4 nae material called nemortOlythe
has been introduced in the manufacture
OF paper. IL IS said to be far superior
tn plaster or kaOlin. II contains from
- 10 10 per cent. of silIcate of magne-
sIL, and resembles in its composition
and other SIhcates of magne-
sIa- 1t is distinguished by Its great
purity and its freedom from peroxide of
IRON, from sulphur and from lime. IL
is of a brilliant white color, and paper
from it takes very high glaze. 1t is
lbrOus, and IS therefore susceptible of
TeltIng. Those who have used 1t speak
very highly of it.
L mar kind OF scale consists of a sim
pie balance arm resting on a nickel
point, supported 10y standard about
inches in height. There are
two scales in the balance arm; one de-
notes the weight and the total cost of
the article weighed, and the other the
unit of price, which is designated 10y a
sliding weight. From this sliding
weight Is suspended the scoop or slab
to contain the article to be weighed.
by this scale the total cost of an article
at any pOlLt is given Immediately upon
weighing 1t.
Tie fifteen great American inventions
OF worldwide adoption are: l, The
cOttOu-gIn; >, the planing-machine; ).
the grass mower and reaper; 4, the /
rotary printing press; >, navigation by /
steam, ., the Eot-aIT engine; :, the
sewing machine; ), the India rubber in
dustry; ., the machine manufacture Of 1
Rorseshoes; 10, the sand-blast for carv-
ins; II, the gauge leather; l., the grain /
elevator; l3, artificial ice-makiug on a !
large scale; II, the electric magnet and |
Its practical applicat.-n; 10, the tele-
phone.
ELDUg Is now initiated on wood by j
SIMPLY painting with a l per cent. solu- |
ton of sulphate of copper, and, on this |
becoming dry, painting the wood Over
with liquid consisting Ofequal weights |
of anIline, hydrOchloriie and spirits of |
wine; the effect of the blue vitriol Is TO |
act on the auilIue, and form nigrosiu, a
black which cannot be effected by acids |
OF alkalIes. 70 this a lustre can be |
added by coating the surface with sim |
pie copal varuish-
For quick filter take clear piece |
OF chamois skin, free from thin places.
cut II OF the desired length, wash in a
weak solution of sal soda or any alkali |
10 remove the grease, and rinse thor
oughly In cold water before using
Inctures, elixIrs, s:TupS. ard even
mUcIlages are filtered rapidly. A pint
or the thickeSt strip will run through
IN four or five minutes. BY washing
thoroughly after each time or using II
will LIST long time.
ErcH the blacksmith need not have
callous OF cracked hands, If he will wash
them IN soft water in which bOrax has
been dissolved two ounces to twelve
quarts OF waterl, rubbing them we'll
with brown soap and fine sand. The
washing must be thorough.
II you should have hiccough try one
OF the following remedies, every one of
which IS yOuched for by different au-
thorltIes- Slightly refrIgerate the lobe
OF the ear; clasp the hands with arms
raised above the head; press the finger
each side under the ear, near jawbone:
Inhale chlorotOrm until relieved.
lie following is a speedy cure for
rheumatism: One quart of milk, quite
hot, INTO which stir one ounce of alum;
this Will make curds and whey. Bathe
the part affected with the whey until
too cold. In the meantime keep the
Curds hot, and. after bathing nut them